$(function() {
    $( "#how-to-play" ).dialog({ 
        autoOpen: false, 
        draggable: false, 
        resizable: false, 
        height: 400, 
        width: 600, 
        title: "About",
    });

    $( "#btn-help" ).on( "click", function() {
        $( "#how-to-play" ).dialog( "open" );
    });
});